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#1 Re: General Discussion about Yamaha Rhinos » Yamaha Rhino 660 problems?? » 2008-02-25 14:25:50

I was wondering on where to get the best deal on a carb kit and a new cdi for the rhino?

#2 Re: General Discussion about Yamaha Rhinos » Yamaha Rhino 660 problems?? » 2008-02-20 21:21:17

Air filter was dirty. Took it out and ran it without it for a sec and it only does 40 mph and then starts sputtering and then backfires and dies. I put a NGK DPR6EA-9 in there. Its a little bit hotter of a plug but it hasnt fouled out yet. Adjusted the valves according to the manual. Ran it again until 40 mph. We had it up to 52-53 on the road to the duck blind every morning. He hasnt had anything done to it. Until now. We have some high volume vacuum fuel pumps in the shop for outboards. Gonna try one of them and see if it works better. Something that kinda caught my attention was when I was test running it if I pulled out the choke it would run at higher rpms. Any suggestions? Thanks for all your help. This is a new project im trying to tackle. Where is the speed sensor and how do you go about checking it?

#3 Re: General Discussion about Yamaha Rhinos » Yamaha Rhino 660 problems?? » 2008-02-19 21:36:26

A guy at our duck club purchased a Rhino in 2006. We drove it one weekend and it was doing about 53. Is that top end for a stock Rhino? The next weekend it would get up to around 35 and just start popping and backfiring. He brought it in today and it wouldnt even start. I took the plugs out and ran a compression test on it. It was about 110 on the gauge. It has spark and getting fuel. I cleaned the plug and put it back in. It started right up. When I gave it gas it would backfire and die. I put a brand new NGK in it. Fired right up. Took it for a spin. I got it to go 45 now before it started to backfire. It keeps fouling plugs. My only guess would be the valves need to be adjusted. Has anyone had this same problem. Is there anything else that I am missing. When I first took the center console out I found a rats nest in there with chewed up wires. 2 wires that went to the carb heater. Fixed them. Another wire that went to another sensor next to the valve cover to the right. Fixed it. Plugs just keep fouling. I am hoping that we just need to adjust the valves. Are there any special tools I will need to do it. I mainly work on 2 stroke outboards so I dont think I will have a special tool for Yamaha if needed. Thank you for your time!

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